Fibonacci sequence beginning 12, 25.

Terms

a(0) =12a(1) =25a(2) =37a(3) =62a(4) =99a(5) =161a(6) =260a(7) =421a(8) =681a(9) =1102a(10) =1783a(11) =2885a(12) =4668a(13) =7553a(14) =12221a(15) =19774a(16) =31995a(17) =51769a(18) =83764a(19) =135533a(20) =219297a(21) =354830a(22) =574127a(23) =928957a(24) =1503084a(25) =2432041a(26) =3935125a(27) =6367166a(28) =10302291a(29) =16669457